hdf5 error

I have a python file which runs correctly in 16.5 ,but when attempting to change simple geometric parameters (about 1e6 vertexs), I get ‘HDF5 error’ and ‘Error creating save file’ and reinstall Trelis can not slove the problem. What does this mean and how can I fix it?

I sloved this issue by cleaning the temproary files in’C:\Users\username\AppData\Local\Temp’